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% Copyright 2018 by Till Tantau
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\section{Fading Library}
\label{section-library-fadings}

\begin{pgflibrary}{fadings}
    The package defines a number of fadings, see
    Section~\ref{section-tikz-transparency} for an introduction.  The
    \tikzname\ version defines special \tikzname\ commands for creating
    fadings. These commands are explained in
    Section~\ref{section-tikz-transparency}.
\end{pgflibrary}

\newcommand\fadingindex[1]{%
  \index{#1@\protect\texttt{#1} fading}%
  \index{Fadings!#1@\protect\texttt{#1}}%
  \texttt{#1}&
  \begin{tikzpicture}[baseline=5mm-.5ex]
    \fill [black!20] (0,0) rectangle (1,1);
    \path [pattern=checkerboard,pattern color=black!30] (0,0) rectangle (1,1);

    \fill [path fading=#1,blue] (0,0) rectangle (1,1);
  \end{tikzpicture} \\[4.5mm]
}

\noindent
\begin{tabular}{ll}
    \emph{Fading name} & \emph{Example (solid blue faded on checkerboard)} \\[1mm]
    \fadingindex{west}
    \fadingindex{east}
    \fadingindex{north}
    \fadingindex{south}
    \fadingindex{circle with fuzzy edge 10 percent}
    \fadingindex{circle with fuzzy edge 15 percent}
    \fadingindex{circle with fuzzy edge 20 percent}
    \fadingindex{fuzzy ring 15 percent}
\end{tabular}


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